Molecular insights into Adgra2/Gpr124 and Reck intracellular trafficking
Adgra2, formerly known as Gpr124, is a key regulator of cerebrovascular development in vertebrates. Together with the GPI-anchored glycoprotein Reck, this adhesion GPCR (aGPCR) stimulates Wnt7-dependent Wnt/β-catenin signaling to promote brain vascular invasion in an endothelial cell-autonomous mann...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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The Company of Biologists
2016-12-01
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| Series: | Biology Open |
| Subjects: | |
| Online Access: | http://bio.biologists.org/content/5/12/1874 |
| _version_ | 1818667714733932544 |
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| author | Naguissa Bostaille Anne Gauquier Laure Twyffels Benoit Vanhollebeke |
| author_facet | Naguissa Bostaille Anne Gauquier Laure Twyffels Benoit Vanhollebeke |
| author_sort | Naguissa Bostaille |
| collection | DOAJ |
| description | Adgra2, formerly known as Gpr124, is a key regulator of cerebrovascular development in vertebrates. Together with the GPI-anchored glycoprotein Reck, this adhesion GPCR (aGPCR) stimulates Wnt7-dependent Wnt/β-catenin signaling to promote brain vascular invasion in an endothelial cell-autonomous manner. Adgra2 and Reck have been proposed to assemble a receptor complex at the plasma membrane, but the molecular modalities of their functional synergy remain to be investigated. In particular, as typically found in aGPCRs, the ectodomain of Adgra2 is rich in protein-protein interaction motifs whose contributions to receptor function are unknown. In opposition to the severe ADGRA2 genetic lesions found in previously generated zebrafish and mouse models, the zebrafish ouchless allele encodes an aberrantly-spliced and inactive receptor lacking a single leucine-rich repeat (LRR) unit within its N-terminus. By characterizing this allele we uncover that, in contrast to all other extracellular domains, the precise composition of the LRR domain determines proper receptor trafficking to the plasma membrane. Using CRISPR/Cas9 engineered cells, we further show that Adgra2 trafficking occurs in a Reck-independent manner and that, similarly, Reck reaches the plasma membrane irrespective of Adgra2 expression or localization, suggesting that the partners meet at the plasma membrane after independent intracellular trafficking events. |
| first_indexed | 2024-12-17T06:24:49Z |
| format | Article |
| id | doaj.art-554f68dfb18040f79682d5ea52f93c1b |
| institution | Directory Open Access Journal |
| issn | 2046-6390 |
| language | English |
| last_indexed | 2024-12-17T06:24:49Z |
| publishDate | 2016-12-01 |
| publisher | The Company of Biologists |
| record_format | Article |
| series | Biology Open |
| spelling | doaj.art-554f68dfb18040f79682d5ea52f93c1b2022-12-21T22:00:19ZengThe Company of BiologistsBiology Open2046-63902016-12-015121874188110.1242/bio.021287021287Molecular insights into Adgra2/Gpr124 and Reck intracellular traffickingNaguissa Bostaille0Anne Gauquier1Laure Twyffels2Benoit Vanhollebeke3 Laboratory of Neurovascular Signaling, Department of Molecular Biology, ULB Neuroscience Institute, Université libre de Bruxelles (ULB), Gosselies B-6041, Belgium Laboratory of Neurovascular Signaling, Department of Molecular Biology, ULB Neuroscience Institute, Université libre de Bruxelles (ULB), Gosselies B-6041, Belgium Center for Microscopy and Molecular Imaging, Université libre de Bruxelles (ULB), Gosselies B-6041, Belgium Laboratory of Neurovascular Signaling, Department of Molecular Biology, ULB Neuroscience Institute, Université libre de Bruxelles (ULB), Gosselies B-6041, Belgium Adgra2, formerly known as Gpr124, is a key regulator of cerebrovascular development in vertebrates. Together with the GPI-anchored glycoprotein Reck, this adhesion GPCR (aGPCR) stimulates Wnt7-dependent Wnt/β-catenin signaling to promote brain vascular invasion in an endothelial cell-autonomous manner. Adgra2 and Reck have been proposed to assemble a receptor complex at the plasma membrane, but the molecular modalities of their functional synergy remain to be investigated. In particular, as typically found in aGPCRs, the ectodomain of Adgra2 is rich in protein-protein interaction motifs whose contributions to receptor function are unknown. In opposition to the severe ADGRA2 genetic lesions found in previously generated zebrafish and mouse models, the zebrafish ouchless allele encodes an aberrantly-spliced and inactive receptor lacking a single leucine-rich repeat (LRR) unit within its N-terminus. By characterizing this allele we uncover that, in contrast to all other extracellular domains, the precise composition of the LRR domain determines proper receptor trafficking to the plasma membrane. Using CRISPR/Cas9 engineered cells, we further show that Adgra2 trafficking occurs in a Reck-independent manner and that, similarly, Reck reaches the plasma membrane irrespective of Adgra2 expression or localization, suggesting that the partners meet at the plasma membrane after independent intracellular trafficking events.http://bio.biologists.org/content/5/12/1874Adgra2/Gpr124ReckWnt7ZebrafishLeucine-rich repeatBlood-brain barrier |
| spellingShingle | Naguissa Bostaille Anne Gauquier Laure Twyffels Benoit Vanhollebeke Molecular insights into Adgra2/Gpr124 and Reck intracellular trafficking Biology Open Adgra2/Gpr124 Reck Wnt7 Zebrafish Leucine-rich repeat Blood-brain barrier |
| title | Molecular insights into Adgra2/Gpr124 and Reck intracellular trafficking |
| title_full | Molecular insights into Adgra2/Gpr124 and Reck intracellular trafficking |
| title_fullStr | Molecular insights into Adgra2/Gpr124 and Reck intracellular trafficking |
| title_full_unstemmed | Molecular insights into Adgra2/Gpr124 and Reck intracellular trafficking |
| title_short | Molecular insights into Adgra2/Gpr124 and Reck intracellular trafficking |
| title_sort | molecular insights into adgra2 gpr124 and reck intracellular trafficking |
| topic | Adgra2/Gpr124 Reck Wnt7 Zebrafish Leucine-rich repeat Blood-brain barrier |
| url | http://bio.biologists.org/content/5/12/1874 |
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